1 Redis Common Commands
Command and Operation
del key. This command is used to delete key in the presence of key
DUMP key Serialize a given key and return the serialized value
EXISTS key Check whet ...
Posted on Wed, 21 Aug 2019 20:21:28 -0700 by webmazter
linux virtual file system VFS
Functions of rootkit
System Call Process
Call Tree of sys_getdents
Log modificat ...
Posted on Thu, 15 Aug 2019 05:44:52 -0700 by phpscriptcoder
.... Chapter 10 signal notes have not been written yet, I guess it's still too dish. Many demo effects in the book are totally different from those in the book. It's a bit difficult to add the signal chapter. I'll fill in the code pit in the book and then fill in the tenth chapter notes.
* 1 Thread
A ty ...
Posted on Sat, 10 Aug 2019 05:34:12 -0700 by peachsnapple
Reader-writer locks are similar to mutexes, but read-write locks allow higher parallelism.Mutexes are either locked or unlocked and can be locked by only one thread at a time.Read and write locks can have three states: read mode locked state, write mode locked state and unlocked state.Only one thread at a time can hold read- ...
Posted on Mon, 05 Aug 2019 11:45:05 -0700 by SkyRanger
The title comes from the Unix Shell exemplar to refine Chapters IV and V of the book, using the datebook file, which reads as follows:
Steve Blenheim:238-923-7366:95 Latham Lane, Easton, PA 83755:11/12/56:20300
Betty Boop:245-836-8357:635 Cutesy Lane, Hollywood, CA 91464:6/23/23:14500
Igor Chevsky:385-375-8395:3567 Populus Place, Caldwell, NJ ...
Posted on Tue, 30 Jul 2019 20:54:05 -0700 by LiquidCD
NodeJs concise tutorial will start from scratch to learn about NodeJs and help JS developers build a full stack development technology stack!
This article is the fifth in a concise NodeJs tutorial, which will introduce the basic operations related to the NodeJs path module.
The path module provides practical tools for processing file paths and ...
Posted on Fri, 19 Jul 2019 23:23:45 -0700 by tukon
New Time and Date API (java.time package)
Use Local Date, Local Time, Local DateTime (human reading time)
Instances of LocalDate, LocalTime, LocalDateTime classes are immutable objects and thread-safe
Indicate the date, time, date and time of using ISO-8601 calendar system respectively. They provid ...
Posted on Fri, 19 Jul 2019 00:55:47 -0700 by rajmohan
Generation and cleanup of linuxc zombie processes
What is a zombie process
A zombie process is one in which the parent process has exited (the parent process has not waited (call wait/waitpid) and becomes a zombie process without process acceptance after dead.
How does the zombie process come about
When a process calls the exit command to end i ...
Posted on Wed, 17 Jul 2019 09:27:49 -0700 by zippers24
The poll function is similar to the select function and can also realize I/O multiplexing. The declaration of the poll function is as follows:
int poll(struct pollfd *fdarray, unsigned long nfds, int timeout);
The first parameter is a pointer to the first element of a structured array. Each array element is a pollfd s ...
Posted on Mon, 15 Jul 2019 12:12:56 -0700 by Dustin013
Title: How to split a Qt project into multiple Qt sub-projects
Environment: Qt 5.6, Qt Creator 3.6.1
When the Qt project becomes large in the development process, it needs to be split into one exe and several dll lib sub-projects.
This paper presents a demonstration of how to achieve this goal.text
Posted on Fri, 05 Jul 2019 13:52:45 -0700 by oh_maestro